In‐situ fabrication of high‐strength SiC joints utilizing a novel CoCrFeNiTiMo high‐entropy alloy filler

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-08-12 DOI:10.1111/jace.20044

Changcong Huang, Jian Chen, Huihui Zhang, Shengjun Liao, Chenxi Gao, Lan Peng, Xuejian Liu, Zhengren Huang

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Abstract

This study utilized an innovative unalloyed CoCrFeNiTiMo hybrid powder as a joining filler to fabricate high‐strength SiC/HEA/SiC joints via in‐situ reaction. The investigation systematically examines the effects of joining parameters on microstructural evolution and mechanical properties. The filler exhibits high reactivity with SiC, addressing carbon enrichment and low‐strength issues. The resulting joining layer comprises HEA‐rich Si, Mo1.5Cr1.5Si, MoTiC2, and TiC phases. Increasing the temperature facilitates carbon diffusion, transforming TiC into MoTiC2 and forming a MoTiC2‐wrapped TiC structure. At 1400°C for 60 min, the joints attain peak flexural and shear strengths of 312 ± 16 and 137 ± 10 MPa, respectively. Additionally, the joints demonstrate excellent oxidation resistance, with a residual strength of 270 ± 7 MPa after 20 h at 900°C, and favorable high‐temperature mechanical strength, retaining 155 ± 14 MPa at 1000°C. A detailed analysis of the joint formation mechanism is conducted based on experimental results and first‐principles calculations.

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利用新型 CoCrFeNiTiMo 高熵合金填料原位制造高强度碳化硅接头

本研究利用一种创新的非合金 CoCrFeNiTiMo 混合粉末作为接合填料，通过原位反应制造高强度 SiC/HEA/SiC 接头。研究系统地考察了连接参数对微观结构演变和机械性能的影响。填料与碳化硅的反应活性很高，解决了碳富集和低强度问题。由此产生的连接层包括富含 HEA 的 Si、Mo1.5Cr1.5Si、MoTiC2 和 TiC 相。温度升高会促进碳扩散，将 TiC 转变为 MoTiC2，形成 MoTiC2 包裹 TiC 结构。在 1400°C 条件下 60 分钟，接头的抗弯和抗剪强度峰值分别达到 312 ± 16 和 137 ± 10 兆帕。此外，接头还表现出优异的抗氧化性，在 900°C 下 20 小时后的残余强度为 270 ± 7 MPa，并具有良好的高温机械强度，在 1000°C 下保持 155 ± 14 MPa。根据实验结果和第一原理计算，对接头的形成机理进行了详细分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.